31.   Gallo said recent research indicates that the chemokines prevent HIV from entering immune cells by interfering with a receptor on the cell surface.

32.   Furthermore, they apparently communicate this tolerance to immune cells elsewhere in the body.

33.   He has gained weight, his asthma and a skin condition have disappeared, and his immune cells have increased slightly.

34.   HIV latches onto an immune cell with the help of a knobby structure.

35.   However, the number of a special type of immune cells known as lymphocytes did drop.

36.   However, this production of IgE triggers our immune cells to release chemicals, one of which is histamine.

37.   If the drug shrinks tumors or boosts the number of immune cells, that may be enough to win approval.

38.   Immune cells bounced back more substantially with the new treatment.

39.   Immune cells called macrophages make their own hemoglobin, which may release nitric oxide to help kill bacteria, fungi or other parasites.

40.   Immunologists know that immune cells recognize foreign proteins by using fingerlike receptors on their surface, but no such receptors for DNA have been found.